Are NPI numbers public?

Yes. NPI numbers are public federal identifiers in CMS NPPES. This page shows the public NPPES facts Fonteum has for NPI 1255426136: provider name, entity type, taxonomy, practice location, enumeration date, last-updated date, and source snapshot date. It does not include patient information.

What does the NPI record show for Risa Aronson-Fox?

Risa Aronson-Fox (NPI 1255426136) appears in CMS NPPES as cardiologist in Ludlow, MA. NPPES is administrative identity data submitted to CMS by providers and organizations; this page displays the source snapshot date as 2026-05-06.

Does this page assign a provider score?

No derived score is assigned on this provider page. NPPES is an identity registry; when a CMS QPP MIPS value is available, Fonteum displays that public CMS value with its source, and absence of a MIPS value is not a quality signal.

Does no exclusion match amount to a clearance?

An exclusion or monitoring record is shown only when a matching public source row is present in Fonteum's loaded federal or state tables. Re-confirm any match against the issuing agency before acting; this page is not a legal or credentialing certification.

Where does the provider data come from?

The identity fields come from CMS NPPES. Additional sections appear only when a public source has a matching row, such as CMS PECOS, CMS Open Payments, Medicare Part D, CMS QPP MIPS, OIG LEIE, or state Medicaid exclusion lists. Source and date metadata appears where the response supplies it; unavailable dates are labeled.

Risa Aronson-Fox — NPI 1255426136: exclusion

Name: Provider record — NPI 1255426136 (Risa Aronson-Fox)
Creator: Fonteum
License: https://www.usa.gov/government-works

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Risa Aronson-Fox — NPI 1255426136: exclusion — Fonteum

Cross-source identity

Sources that publish this NPI

National Provider Identifier 1255426136 appears in the source rows shown below. Sources that do not publish NPI use their own identifiers and are not treated as deterministic NPI matches. Chips show response-supplied dates when available; otherwise they are labeled date unavailable.

NPPESOIG LEIE

Federal sources carrying NPI 1255426136
Federal source	Key	What it provides	Source & date
CMS NPPES	NPI 1255426136	Registry identity — cardiologist, taxonomy 207RC0000X	Source:CMS NPPESSnapshot 2026-05-06
OIG LEIE	NPI 1255426136	Federal exclusion-list listing	Source:OIG LEIESnapshot 2026-06-30

Risa Aronson-Fox

Public NPPES answers

Are NPI numbers public?

What does the NPI record show for Risa Aronson-Fox?

Does this page assign a provider score?

Does no exclusion match amount to a clearance?

Where does the provider data come from?

Sources that publish this NPI

MIPS quality score

Standing

Who owns, operates, or is affiliated with this provider

Retained versions for this record

Risa Aronson-Fox

Public NPPES answers

Are NPI numbers public?

What does the NPI record show for Risa Aronson-Fox?

Data-use and correction resources.

Does this page assign a provider score?

Does no exclusion match amount to a clearance?

Where does the provider data come from?

Sources that publish this NPI

MIPS quality score

Standing

Who owns, operates, or is affiliated with this provider

Retained versions for this record

Other providers in MA

Context for this record